IS MY ANSWER RIGHT? answer d

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable y is eliminated in the first and second equations, then the second and third equations.
3x - y + 3z = 1
4x + y - 6z = 3
4x - 2y + 3z = -3 (4 points)
Answer

7x - 3z = 4
12x - 9z = 3

7x - 3z = 4
4x - 6z = 3

3x + 3z = 1
12x - 9z = 3

3x + 3z = 1
4x - 6z = 3

Question

IS MY ANSWER RIGHT? answer d

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable y is eliminated in the first and second equations, then the second and third equations.
3x - y + 3z = 1
4x + y - 6z = 3
4x - 2y + 3z = -3 (4 points)
Answer
		
7x - 3z = 4
12x - 9z = 3
		
7x - 3z = 4
4x - 6z = 3
		
3x + 3z = 1
12x - 9z = 3
		
3x + 3z = 1
4x - 6z = 3

anonymous · Answer

A is the correct option.. Hope this helps

anonymous · Answer

add eqs 1 & 2 then u get 7x - 3z = 4

multiply eq-2 by 2 and then add to eq-3, as below

2*(4x + y - 6z) = 2*3
=> 8x + 2y - 12z = 6, now add to eq-3, then u get
12x - 9z = 3
so, the correct answer is A option..

anonymous · Answer

i love you thank you thank you